在Lua中连接功能名称

Question

This is probably really simple but I'm new so here we go..

How would I code this:

local color1 = { 255,0,0 }
local color2 = { 1,200,1 }
local color3 = { 2,2,150 }
for i = 1, 3 do 
    local x = "color" .. i[i]
    print( x )
end

What I am looking for as output

255  
200  
150 

Answer 1

The simplest solution would be to put the color info in an array

local colors = {
    { 255,0,0 },
    { 1,200,1 },
    { 2,2,150 },
}

-- Iterating by hand:
for i=1, #colors do
    local rgb = colors[i]
    print(rgb[i])
end

-- ipairs is another way to do the same thing
for i, rgb in ipairs(colors) do
    print(rgb[i])
end

Answer 2

If the color1 , color2 and color3 tables are static; you can try this approach:

local color1, color2, color3 = { 255,0,0 }, { 1,200,1 }, { 2,2,150 }
color = { color1 = color1, color2 = color2, color3 = color3 }
for i = 1, 3 do 
    local x = color["color"..i][i]
    print( x )
end

Output: http://codepad.org/qL5K3jNq